Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Feeding network"”.
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Modification of Aplysia Feeding Network By L-Dopa and Dopamine-Dependent Learning
… (DA) is a ubiquitous neuromodulator of neuronal networks in the animal kingdom and has a well-established role in modulating motor behavior and encoding reward information. Although the effects of DA and DA-dependent learning at the behavioral and molecular levels are well-understood, many …
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Substrate Integrated Waveguide Horn Slot Antenna Array
… transmission line concept is used to construct a feeding network based on these components to speed up the design process. This concept is verified with full wave analysis. Co-simulation technique is investigated and implemented for the feeding network using these passive components resulting in …
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A neuronal switch for approach/avoidance in cost-benefit decision
… avoid appetitive stimuli. A multifunctional turn network is active in response to the unilateral application of the stimulus, promoting the appropriate turn response. The goal of my study was to answer the following questions: 1) How does the nervous system encode the appetitive state of animal? …
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Novel decoupling networks for small antenna arrays
… system performance degradation. A decoupling network can compensate for the mutual coupling effect to yield decoupled ports and fixed input impedances. In this thesis, a systematic design approach for decoupling networks of circular symmetric arrays is formulated by using a step-by-step …
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Neural Mechanisms of Decision-Making: Modulation of the Feeding Neural Network by Nitric Oxide and Serotonin in the Predatory Marine Snail Pleurobranchaea Californica
Animals make feeding and avoidance decisions weighing the cost of foraging with potential metabolic gains based on the their experience and internal state (i.e. hunger level). Here, I describe the potential roles and mechanisms of two endogenous neuromodulators, the signal molecule nitric oxide …
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Reciprocal interactions between feeding and turning motor networks mediate foraging decisions in a predatory sea-slug
… and cooperative interactions between motor networks mediating different behaviors. These decisions are based on appetitive state, i.e., the moment-to-moment integration of sensation, physiological state, and learning. As a generalist predator, the sea-slug Pleurobranchaea californica …
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Técnicas de barrido electrónico por frecuencia con agrupaciones de antenas de banda milimétrica y submilimétrica
… using rectangular waveguides. In the first one a feeding network based on different length paths is used to obtain the frequency scanning behavior. The radiating elements of this array are eight apertures. Based on the first design two more antenna arrays have been implemented. One of them uses …
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Design and Implementation of Radio Frequency Power Feeding Networks for Antenna Array Applications: Simulation and Measurements of Multiport, Equal and Unequal, Fixed and Reconfigurable Radio Frequency Power Feeding Networks for Narrow and Ultra-Wideband Applications
… Wilkinson power divider with its distinctive feeding network characteristics. A comprehensive review indicated that limited research is carried out in the area of planar multiport and reconfigurable power dividers in terms of the power levels between output ports. The main objectives of this …
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Design and Implementation of System Components for Radio Frequency Based Asset Tracking Devices to Enhance Location Based Services. Study of angle of arrival techniques, effects of mutual coupling, design of an angle of arrival algorithm, design of a novel miniature reconfigurable antenna optimised for wireless communication systems
… is uniplanar printed logspiral with striplines feeding network and biased components to improve the impedance bandwidth. The antenna provides the benefit of small size, and re-configurability and is very well suited for the asset tracking applications.
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Incorporation of feed-network and circuit modeling into the time-domain finite element analysis of antenna arrays and microwave circuits
… algorithms are developed to incorporate the feed-network and circuit modeling into the time-domain finite element analysis of antenna arrays and microwave circuits. First, simulation of an antenna system requires accurate modeling of interactions between the radiating elements and the associated …
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Single-band and Dual-band Beam Switching Systems and Offset-fed Beam Scanning Reflectarray
… A Butler matrix is one of the useful beamforming networks for a phased array antenna. A Double-Sided Parallel-Strip Line (DSPSL) is adapted for the feeding network of eight array elements. The DSPSL operate very well to feed the microstrip antenna array over the bandwidth to reduce the sidelobe …
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Modeling and design of near-field antennas with periodic structures
… large ZPSL loop antenna with a simple feeding network. The AMC reflector with four-arm spiral unit cells is included to achieve a directional field distribution as well as to further increase the magnetic field intensity. Fifth, two low-profile ZPSL loop antennas are proposed to achieve …
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Characterization of an Inhibitory Pathway to Feeding Command Neurons in the Brain of Pleurobranchaea Californica and an Analysis of the Changes in This Pathway That Occur as a Result of Food-Avoidance Conditioning
… californica which influences the activity of the feeding command neurons, the paracerebral neurons (PCNs) is described and the pathway's role in feeding is analyzed. A study of the location of the oscillators which initiate and control feeding in this animal is described. The changes that occur in …
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Integrierte planare Millimeterwellenantenne mit hohem Gewinn
… for the integration of base stations in WIMAX networks. The gain of the antennas is better than 30dB. The polarization of the arrays are linear and circular, respectively. The base elements of the arrays are micro strip patches. In each case nine rectangular patches are combined into nearly …
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Prey avoidance learning and neuronal elements mediating behavioral switching in the predatory sea-slug Pleurobranchaea californica
… not affect the internal state of the animal. Feeding thresholds for the appetitive stimulus betaine are not significantly changed, and it continues to attack a related prey species, Hermissenda crassicornis. This prey avoidance paradigm resembles a situation the predators may face in their …
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3D Micromachined Passive Components and Active Circuit Integration for Millimeter-wave Radar Applications
… implementations of RF monopulse comparator networks. These architectures are enabled by a high-performance three-dimensional rectangular coaxial microwave transmission line technology known as PolyStrataTM as well as silicon-based IC technologies. A number of specific components are examined …
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Design and applications of smart antenna systems for wireless networks in the context of the Internet of Things (IOT)
… due to their advantages, such as, simple feeding network, high directivity and passive frequency-scanning performance. However, they present certain disadvantages among which, the most important to highlight is the beam-squinting effect. TThis is due to the inherent dispersion property of …